Positioning guide for an ink tank



FIG. 1 is a right side view of a positioning guide for an ink tank;

FIG. 2 is a rear view thereof;

FIG. 3 is a top perspective view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a bottom perspective view thereof also showing a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is an enlarged perspective view of a portion of FIG. 3.

The broken lines define the bounds of the claimed design but do not form part of the claimed design. 

The ornamental design for a positioning guide for an ink tank, as shown and described. 